A pug is a type of dog with a wrinkly face, has a curled tail, and pug puppies are called puglets.The pug has a square, muscular body with a large head, big eyes, and small ears. They are very active but they sleep a lot. In my opinion, pugs are very cute, but others may not agree with me. I own a pug named Penelope that is cute, funny and very active. These are reasons that pugs are such good dogs.